/* ==========================================================================
   球速看台 · 共享样式表 /assets/site.css
   夜色球场 + 数据面板：深墨绿基底、荧光青绿高亮、橙红即时状态
   ========================================================================== */

/* --- 1. 重置 ------------------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd,
ul, ol { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

table { border-collapse: collapse; border-spacing: 0; }

a { color: inherit; text-decoration: none; }

::selection { background: var(--neon-cyan); color: var(--ink-base); }

/* --- 2. 设计令牌 -------------------------------------------------------- */
:root {
  --ink-base: #07130F;
  --pitch-dark: #0E2A22;
  --pitch-mid: #174A3A;
  --neon-cyan: #00F5A0;
  --neon-cyan-soft: #7CFFD1;
  --status-orange: #FF5A36;
  --status-orange-deep: #C7361D;
  --text-primary: #F4FFF9;
  --text-secondary: #A9C6BA;
  --border-strong: #2F6B57;

  --font-display: "Arial Narrow", "Helvetica Neue", "Roboto Condensed", Impact,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-heading: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Serif SC",
    "Songti SC", "Microsoft YaHei", serif;
  --font-data: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --shell-max: 1280px;
  --shell-wide: 1480px;
  --gutter: clamp(1rem, 4vw, 3rem);
  --rule: 2px solid var(--border-strong);
  --hard-shadow: 8px 8px 0 rgba(0, 245, 160, 0.14);
  --hard-shadow-orange: 8px 8px 0 rgba(255, 90, 54, 0.16);
}

/* --- 3. 中文排版基底 ---------------------------------------------------- */
body {
  background-color: var(--ink-base);
  background-image:
    radial-gradient(1100px 620px at 10% -10%, rgba(0, 245, 160, 0.10), transparent 62%),
    radial-gradient(900px 520px at 94% 2%, rgba(255, 90, 54, 0.07), transparent 60%);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (min-width: 768px) {
  body { font-size: 17px; }
}

p { max-width: 72ch; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(1.9rem, 4.8vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.1rem, 1.9vw, 1.4rem); }
h4 { font-size: clamp(1rem, 1.4vw, 1.1rem); }

strong { font-weight: 700; color: var(--neon-cyan-soft); }

#main-content { scroll-margin-top: 6.5rem; }

/* --- 4. 通用布局 -------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--wide { max-width: var(--shell-wide); }

.section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
  border-top: 2px solid var(--pitch-mid);
}

.section:first-of-type { border-top: 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--neon-cyan);
  flex: none;
}

.lede {
  font-size: clamp(1rem, 1.35vw, 1.14rem);
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 72ch;
}

.prose { max-width: 72ch; }
.prose > * + * { margin-top: 1.05em; }
.prose h2 { margin-top: 1.9em; }
.prose h3 { margin-top: 1.5em; }
.prose ul { list-style: disc; padding-left: 1.35rem; }
.prose ol { list-style: decimal; padding-left: 1.35rem; }
.prose li + li { margin-top: 0.4rem; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.split--even { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.split--reverse { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.2vw, 1.75rem);
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* --- 5. 基础组件 -------------------------------------------------------- */
.panel {
  position: relative;
  background: var(--pitch-dark);
  border: var(--rule);
  padding: clamp(1rem, 2.4vw, 1.75rem);
}

.panel--flat { background: transparent; }
.panel--accent {
  border-color: var(--neon-cyan);
  box-shadow: var(--hard-shadow);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.3rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  background: transparent;
  border: 2px solid var(--border-strong);
  cursor: pointer;
  transition: transform 0.16s ease, background-color 0.16s ease,
    border-color 0.16s ease, color 0.16s ease;
}

.btn:hover { border-color: var(--neon-cyan); background: rgba(0, 245, 160, 0.1); }
.btn:active { transform: translateY(2px); }

.btn--primary {
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  color: var(--ink-base);
}

.btn--primary:hover {
  background: var(--neon-cyan-soft);
  border-color: var(--neon-cyan-soft);
  color: var(--ink-base);
}

.btn--alert {
  background: var(--status-orange);
  border-color: var(--status-orange);
  color: #170704;
}

.btn--alert:hover {
  background: var(--status-orange-deep);
  border-color: var(--status-orange-deep);
  color: var(--text-primary);
}

.btn--ghost { border-style: dashed; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--neon-cyan);
  border-bottom: 2px solid transparent;
  transition: border-color 0.16s ease, color 0.16s ease;
}

.link-arrow::after {
  content: "→";
  transition: transform 0.16s ease;
}

.link-arrow:hover { border-bottom-color: var(--neon-cyan); }
.link-arrow:hover::after { transform: translateX(4px); }

.breadcrumbs {
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--border-strong);
}

.breadcrumbs a { transition: color 0.16s ease; }
.breadcrumbs a:hover { color: var(--neon-cyan); }
.breadcrumbs [aria-current="page"] { color: var(--text-primary); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid var(--border-strong);
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.tag--live {
  border-color: var(--status-orange);
  color: var(--status-orange);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem;
  background: var(--pitch-dark);
  border-left: 3px solid var(--neon-cyan);
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 0 3px rgba(0, 245, 160, 0.16);
  flex: none;
}

.status-dot--live {
  background: var(--status-orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 54, 0.2);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-left: 0.9rem;
  border-left: 4px solid var(--neon-cyan);
}

.stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 0.94;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.stat--alert { border-left-color: var(--status-orange); }
.stat--alert .stat-value { color: var(--status-orange); }

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: var(--rule);
  background: var(--pitch-dark);
}

.data-table {
  width: 100%;
  min-width: 520px;
  font-family: var(--font-data);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.data-table caption {
  padding: 0.85rem 1rem;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--neon-cyan-soft);
  border-bottom: 2px solid var(--border-strong);
}

.data-table th,
.data-table td {
  padding: 0.7rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--pitch-mid);
  white-space: nowrap;
}

.data-table thead th {
  background: rgba(0, 245, 160, 0.06);
  color: var(--neon-cyan-soft);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.data-table tbody tr { transition: background-color 0.16s ease; }
.data-table tbody tr:hover { background: rgba(0, 245, 160, 0.08); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table .num { text-align: right; }

/* --- 6. 图片容器基础规则 ------------------------------------------------ */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--ink-base);
  border: var(--rule);
  box-shadow: var(--hard-shadow);
}

.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, transparent 50%, var(--neon-cyan) 50%);
  pointer-events: none;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--board { aspect-ratio: 4 / 5; }

.media-caption {
  margin-top: 0.6rem;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* --- 7. 头部 ------------------------------------------------------------ */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 130;
  padding: 0.7rem 1.1rem;
  background: var(--neon-cyan);
  color: var(--ink-base);
  font-family: var(--font-heading);
  font-weight: 700;
  border: 2px solid var(--ink-base);
  transition: top 0.18s ease;
}

.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(7, 19, 15, 0.99), rgba(7, 19, 15, 0.94));
  border-bottom: 2px solid var(--border-strong);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header::after {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--neon-cyan) 0 26%,
    transparent 26% 70%,
    var(--status-orange) 70% 100%
  );
}

.header-frame {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(0.55rem, 1.2vw, 0.95rem) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: center;
  gap: clamp(1rem, 3vw, 3rem);
}

.site-header.is-compact .header-frame { padding-block: 0.4rem; }
.site-header.is-compact .brand-tagline { display: none; }

.header-left {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.brand-mark {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-left: 0.65rem;
  border-left: 6px solid var(--neon-cyan);
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.4vw, 1.9rem);
  line-height: 1;
  letter-spacing: 0.08em;
}

.brand-tagline {
  font-family: var(--font-body);
  font-size: clamp(0.72rem, 1vw, 0.82rem);
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.header-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  max-width: none;
}

.header-status .status-label { color: var(--neon-cyan-soft); }
.header-status .status-date { color: var(--text-primary); }

.region-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--border-strong);
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.8rem;
  background: var(--pitch-dark);
  border: 2px solid var(--border-strong);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.16s ease, background-color 0.16s ease;
}

.nav-toggle:hover { border-color: var(--neon-cyan); }

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
  flex: none;
}

.nav-toggle-bar {
  height: 2px;
  width: 100%;
  background: var(--neon-cyan);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.site-header[data-open] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-bar:nth-child(2) { opacity: 0; }

.site-header[data-open] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  min-width: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.2rem, 0.9vw, 0.9rem);
}

.nav-item { display: flex; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.65rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(0.78rem, 1vw, 0.92rem);
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease,
    background-color 0.18s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  border-bottom-color: var(--neon-cyan);
}

.nav-link[aria-current="page"] {
  color: var(--ink-base);
  background: var(--neon-cyan);
  border-bottom-color: var(--neon-cyan);
}

.nav-item--live .nav-link::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  flex: none;
  background: var(--status-orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 54, 0.2);
}

.nav-item--live .nav-link[aria-current="page"]::before {
  box-shadow: 0 0 0 3px rgba(7, 19, 15, 0.35);
}

/* --- 8. 页脚 ------------------------------------------------------------ */
.site-footer {
  background: var(--pitch-dark);
  color: var(--text-primary);
  border-top: 2px solid var(--border-strong);
}

.footer-track {
  height: clamp(26px, 4.5vw, 54px);
  border-bottom: 2px solid var(--pitch-mid);
  background-image:
    repeating-linear-gradient(
      115deg,
      transparent 0 16px,
      rgba(0, 245, 160, 0.32) 16px 18px,
      transparent 18px 44px
    ),
    repeating-linear-gradient(
      115deg,
      transparent 0 62px,
      rgba(255, 90, 54, 0.22) 62px 64px,
      transparent 64px 120px
    ),
    linear-gradient(180deg, var(--ink-base), var(--pitch-dark));
}

.footer-frame {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3.5rem) var(--gutter) clamp(1.6rem, 3vw, 2.4rem);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.footer-brand { min-width: 0; }

.footer-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.08em;
  max-width: none;
  padding-left: 0.7rem;
  border-left: 6px solid var(--neon-cyan);
}

.footer-tagline {
  margin-top: 0.9rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 34ch;
}

.footer-region {
  display: inline-flex;
  margin-top: 1.1rem;
  padding: 0.25rem 0.7rem;
  border: 2px solid var(--border-strong);
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--neon-cyan-soft);
  max-width: none;
}

.footer-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2.4rem);
}

.footer-col { min-width: 0; }

.footer-heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--neon-cyan);
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--pitch-mid);
  max-width: none;
}

.footer-links { margin-top: 0.9rem; }
.footer-links li + li { margin-top: 0.5rem; }

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.94rem;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-link::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--border-strong);
  transition: background-color 0.16s ease;
}

.footer-link:hover {
  color: var(--text-primary);
  border-bottom-color: var(--neon-cyan);
}

.footer-link:hover::before { background: var(--neon-cyan); }

.footer-contact { margin-top: 0.9rem; }

.contact-row {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  gap: 0.6rem;
  padding-block: 0.45rem;
  border-bottom: 1px dashed var(--pitch-mid);
}

.contact-label {
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--neon-cyan-soft);
}

.contact-value {
  font-family: var(--font-data);
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--text-primary);
  word-break: break-word;
}

.footer-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 44ch;
}

.footer-legal {
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
  padding-top: 1rem;
  border-top: 2px solid var(--pitch-mid);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.footer-icp,
.footer-copyright { max-width: none; }

.footer-icp { color: var(--neon-cyan-soft); }

/* --- 9. 滚动辅助（由 site.js 动态创建） --------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  height: 3px;
  width: 0;
  pointer-events: none;
  background: linear-gradient(90deg, var(--neon-cyan), var(--status-orange));
}

.to-top {
  position: fixed;
  right: clamp(0.8rem, 2vw, 1.5rem);
  bottom: clamp(0.8rem, 2vw, 1.5rem);
  z-index: 110;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  background: var(--ink-base);
  color: var(--neon-cyan);
  border: 2px solid var(--border-strong);
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s,
    border-color 0.18s ease, background-color 0.18s ease;
}

.to-top.is-active {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  border-color: var(--neon-cyan);
  background: var(--pitch-dark);
}

/* --- 10. 焦点与可访问性 ------------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--status-orange);
  outline-offset: 2px;
}

/* --- 11. 响应式 --------------------------------------------------------- */
@media (max-width: 1060px) {
  .header-frame {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: 0;
    padding-block: 0.6rem;
  }

  .nav-toggle {
    display: inline-flex;
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.28s ease;
  }

  .site-header[data-open] .site-nav { max-height: 34rem; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding-block: 0.6rem;
  }

  .nav-item { display: block; }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0.9rem 0.6rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--pitch-mid);
  }

  .nav-link:hover { border-bottom-color: var(--neon-cyan); }

  .nav-item:last-child .nav-link { border-bottom: 0; }

  .header-status { font-size: 0.7rem; }
}

@media (max-width: 960px) {
  .split,
  .split--even,
  .split--reverse {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-3,
  .span-4 { grid-column: span 3; }
  .span-5,
  .span-6,
  .span-7,
  .span-8 { grid-column: span 6; }
}

@media (max-width: 640px) {
  .footer-matrix { grid-template-columns: minmax(0, 1fr); }
  .footer-legal { flex-direction: column; align-items: flex-start; }

  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .span-3,
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8,
  .span-12 { grid-column: span 1; }

  .contact-row { grid-template-columns: minmax(0, 1fr); gap: 0.1rem; }

  .nav-toggle-label { display: none; }
  .nav-toggle { padding: 0.55rem 0.65rem; }
}

/* --- 12. 降级动效 ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}